JP2020127313A - On-vehicle communication device, vehicle power supply system, computer program, and processing restart method - Google Patents

Abstract

To provide an on-vehicle communication device, a vehicle power supply system, a computer program, and a processing restart method with which interrupted processing can be restarted when processing related to power supply conducted between a power supply device and a vehicle is interrupted.SOLUTION: An on-vehicle communication device includes: a power supply communication processing unit which executes a plurality of pieces of processing related to power supply, in a predetermined order, by transmitting and receiving data to/from a power supply device; a storage unit which stores an interruption site when processing by the power supply communication processing unit is interrupted; and a restart processing unit which restarts processing of the power supply communication processing unit, in accordance with the interruption site stored in the storage unit. The restart processing unit restarts the plurality of pieces of processing from the beginning, when the interruption has occurred before completion of a first prescribed processing contained in the plurality of pieces of processing to be executed in the predetermined order, and restarts processing from the interruption site stored in the storage unit, after executing the plurality of pieces of processing from the beginning to the first prescribed processing, when the interruption has occurred after completing the first prescribed processing.SELECTED DRAWING: Figure 1

Description

The present invention relates to an in-vehicle communication device, a vehicle power feeding system, a computer program, and a process restart method that perform processing related to power feeding from a power feeding device to a vehicle.

Plug-in hybrid vehicles that use both an electric motor and an engine, and electric vehicles that are not equipped with an engine and that are driven by an electric motor are becoming popular. Vehicles such as plug-in hybrid vehicles and electric vehicles are equipped with a battery for storing electric power for driving an electric motor, and power supply to the battery is performed by an external power supply device. Various information exchanges are performed between the power supply device and the vehicle when power is supplied. In recent years, a wireless power feeding system has been developed in which power is fed in a contactless manner without connecting a power feeding device to a vehicle with a power feeding cable. In the wireless power feeding system, since the charging device and the vehicle are not connected via the power feeding cable, various information necessary for power feeding is exchanged between the power feeding device and the vehicle by wireless communication.

Patent Document 1 proposes a wireless power supply device for a vehicle, which aims to correctly guide the vehicle to a target stop position where the power receiving coil of the vehicle is close to the power transmitting coil of the parking lot. The vehicle wireless power supply device includes a plurality of light emitting units arranged corresponding to the wheel stop regions. The wireless power supply device for a vehicle detects a wheel interval in the width direction of a vehicle that is a power supply target, and controls some light emitting units and other light emitting units to emit light in mutually different states according to the detection result.

JP, 2011-106216, A

Various processes such as information exchange performed between the power feeding device and the vehicle are performed in a predetermined order defined in a wireless power feeding protocol or the like. In a system in which information is exchanged wirelessly between a power supply device and a vehicle, wireless communication is temporarily interrupted due to, for example, ambient noise, an obstacle between the power supply device and the vehicle, and the like. It is possible that the process related to power supply during the period is interrupted.

The present invention has been made in view of such circumstances, and an object of the present invention is to restart the interrupted process when the process related to the power supply performed between the power supply device and the vehicle is interrupted. An object is to provide an in-vehicle communication device, a vehicle power supply system, a computer program, and a process restart method that can be performed.

The in-vehicle communication device according to the present aspect is an in-vehicle communication device that wirelessly communicates with a power supply device that supplies power to a vehicle, and transmits and receives data to and from the power supply device, thereby providing a plurality of power supply devices. Based on the interruption point stored in the storage section, and the storage section that stores the interruption point when the interruption of the processing by the power feeding communication processing section and the power feeding communication processing section that executes the processing of a predetermined order, And a restart processing unit for restarting the processing of the power feeding communication processing unit, wherein the restart processing unit, when the interruption occurs before completion of the first predetermined process included in the plurality of processes executed in a predetermined order, When the plurality of processes are restarted from the beginning and an interruption occurs after the completion of the first predetermined process, the plurality of processes are executed from the beginning to the first predetermined process, and then the interruption stored in the storage unit. Restart processing from the point.

Note that the present application can be realized not only as an in-vehicle communication device including such a characteristic processing unit but also as a method for restarting processing that includes such characteristic processing as a step, and that the step is executed by a computer. It can be realized as a computer program for performing the above. Further, it can be realized as a semiconductor integrated circuit that realizes a part or all of the in-vehicle communication device, or can be realized as another device or system including the in-vehicle communication device.

According to the above, when the process related to the power supply performed between the power supply device and the vehicle is interrupted, the interrupted process can be restarted.

It is a schematic diagram for explaining an outline of a vehicle power feeding system according to the present embodiment. 5 is a flowchart for explaining an outline of a procedure of power supply processing performed in the vehicle power supply system according to the present embodiment. It is a schematic diagram which shows the detailed example of electric power feeding processing. FIG. 3 is a block diagram showing a configuration of a charging communication ECU according to the present embodiment. It is a block diagram which shows the structure of the electric power feeder which concerns on this Embodiment. It is a schematic diagram for explaining the correspondence between the interrupted portion and the restarted portion of the power feeding process. 6 is a flowchart showing a procedure of a restart process performed by the charging communication ECU according to the present embodiment. 7 is a flowchart showing a procedure of a restart location determination process performed by the charging communication ECU according to the present embodiment.

[Description of Embodiments of the Present Invention]
First, embodiments of the present invention will be listed and described. Further, at least a part of the embodiments described below may be arbitrarily combined.

(1) An in-vehicle communication device according to this aspect is an in-vehicle communication device that performs wireless communication with a power supply device that supplies power to a vehicle, and transmits and receives data to and from the power supply device to supply power. The power supply communication processing unit that executes a plurality of processes according to a predetermined order, and a storage unit that stores the interrupted position when the processing by the power supply communication processing unit occurs, and the interrupted position stored in the storage unit. A restart processing unit that restarts the processing of the power supply communication processing unit, and the restart processing unit is interrupted before completion of the first predetermined processing included in the plurality of processings executed in a predetermined order. In this case, if the plurality of processes are restarted from the beginning and an interruption occurs after the completion of the first predetermined process, the plurality of processes are executed from the beginning to the first predetermined process and then stored in the storage unit. The process is restarted from the stored interruption point.

In this aspect, the power feeding device that feeds power to the vehicle and the vehicle-mounted communication device mounted on the vehicle perform wireless communication to transmit and receive data, thereby performing a plurality of processes related to power feeding in a predetermined order. .. When an interruption occurs in these processes, the vehicle-mounted communication device stores the interruption point and tries to restart the process based on the stored interruption point. At this time, if the interruption occurs before the completion of the first predetermined process included in the plurality of processes executed in the predetermined order, the in-vehicle communication device restarts the plurality of processes from the beginning. Further, when the interruption occurs after the completion of the first predetermined processing, the vehicle-mounted communication device restarts the processing from the stored interruption point after executing the plurality of processing from the beginning to the first predetermined processing. As a result, the in-vehicle communication device can reliably execute the minimum required first predetermined process, omit unnecessary processes, and restart the interrupted process. The increase can be suppressed.

(2) The first predetermined process is preferably a process of establishing wireless communication between the power supply device and the in-vehicle communication device by a predetermined communication protocol.

In the present aspect, the process of establishing wireless communication between the power supply device and the in-vehicle communication device according to a predetermined communication protocol is referred to as a first predetermined process. As a result, the in-vehicle communication device can reliably execute the minimum required wireless communication and at the same time, omit the other processing and restart the interrupted processing.

(3) A movement detection unit that detects movement of the vehicle during the processing of the power feeding communication processing unit is provided, and the restart processing unit is interrupted after the start of the second predetermined process that is executed after the first predetermined process. Occurs and the movement of the vehicle is not detected by the movement detection unit, the plurality of processes are executed from the beginning to the first predetermined process, and then, from the interruption point stored in the storage unit. When the process is restarted and an interruption occurs after the start of the second predetermined process, and the movement of the vehicle is detected by the movement detection unit, the plurality of processes are executed from the beginning to the first predetermined process. After that, it is preferable to restart from the second predetermined process.

In this aspect, the in-vehicle communication device detects the movement of the vehicle being processed. When the in-vehicle communication device is interrupted after the start of the second predetermined process executed after the first predetermined process and the movement of the vehicle is not detected, the on-vehicle communication device executes the plurality of processes from the first to the first predetermined process. After the processing is executed, the processing is restarted from the stored interrupted point. In addition, when an interruption occurs after the start of the second predetermined process and the movement of the vehicle is detected, the in-vehicle communication device executes a plurality of processes from the beginning to the first predetermined process, and then from the second predetermined process. Restart the process. Accordingly, the in-vehicle communication device can appropriately execute the second predetermined process that is affected by the presence or absence of movement of the vehicle.

(4) It is preferable that the second predetermined process is a process of aligning the vehicle with the power supply device.

In this aspect, the process of aligning the vehicle with the power supply device is the second predetermined process. As a result, the in-vehicle communication device can appropriately execute the alignment process affected by the presence or absence of movement of the vehicle.

(5) A vehicle power feeding system according to this aspect is a vehicle power feeding system including a power feeding device that feeds power to a vehicle and an in-vehicle communication device that wirelessly communicates with the power feeding device, wherein the in-vehicle communication device includes: , A power feeding communication processing unit that executes a plurality of processes related to power feeding in a predetermined order by transmitting and receiving data to and from the power feeding device, and interrupts when the processing by the power feeding communication processing unit is interrupted. And a restart processing unit that restarts the processing of the power feeding communication processing unit based on the interrupted position stored in the storage unit, and the restart processing unit executes in a predetermined order. When the interruption occurs before the completion of the first predetermined processing included in the plurality of processings, the plurality of processings are restarted from the beginning, and when the interruption occurs after the completion of the first predetermined processing, the plurality of processings From the beginning to the first predetermined process, the process is restarted from the interrupted position stored in the storage unit, and the power supply device restarts the process from the process corresponding to the process restarted by the restart processing unit. Let

In this aspect, similarly to aspect (1), it is possible to suppress an increase in processing time due to interruption of processing.

(6) It is preferable that the power supply device or the in-vehicle communication device includes a matching processing unit that performs processing for matching the restarted portion of the processing.

In this aspect, the in-vehicle communication device or the power supply device performs a process of matching the process to be restarted when the interrupted process is restarted. As a result, the in-vehicle communication device and the power supply device can reliably restart the interrupted process.

(7) The computer program according to the present aspect allows a plurality of in-vehicle communication devices that perform wireless communication with a power supply device that supplies power to a vehicle to transmit and receive data to and from the power supply device, thereby performing a plurality of operations related to power supply. When the plurality of processes are interrupted in a predetermined order, the interruption point is stored in the storage unit, and before the completion of the first predetermined process included in the plurality of processes executed in the predetermined order. When an interruption occurs, the plurality of processes are restarted from the beginning, and when an interruption occurs after the completion of the first predetermined process, after the plurality of processes are executed from the beginning to the first predetermined process, A process for restarting the process from the interrupted point stored in the storage unit is executed.

In this aspect, similarly to aspect (1), it is possible to suppress an increase in processing time due to interruption of processing.

(8) The method for resuming processing according to the present aspect uses a vehicle-mounted communication device that wirelessly communicates with a power supply device that supplies power to a vehicle, and transmits and receives data to and from the power supply device to supply power. When a plurality of processes according to the above are executed in a predetermined order and an interruption occurs in the plurality of processes, the interruption point is stored in the storage unit, and the first predetermined process included in the plurality of processes executed in the predetermined order is executed. When the interruption occurs before the completion, the plurality of processes are restarted from the beginning, and when the interruption occurs after the completion of the first predetermined process, the plurality of processes are executed from the beginning to the first predetermined process. After that, the process is restarted from the interruption point stored in the storage unit.

In this aspect, similarly to aspect (1), it is possible to suppress an increase in processing time due to interruption of processing.

[Details of the embodiment of the present invention]
A specific example of the vehicle power feeding system according to the embodiment of the present invention will be described below with reference to the drawings. It should be noted that the present invention is not limited to these exemplifications, and is shown by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

<System overview>
FIG. 1 is a schematic diagram for explaining the outline of the vehicle power feeding system according to the present embodiment. The vehicle power feeding system according to the present embodiment is a system for wirelessly feeding power to a battery 2 mounted on a vehicle 1 such as an electric vehicle or a hybrid vehicle from a power feeding device 6 installed at a power feeding station or the like. .. The vehicle 1 is wirelessly transmitted from a charging control ECU (Electronic Control Unit) 3 that controls charging of the battery 2, a charging communication ECU 4 that wirelessly communicates with the power feeding device 6, and a power transmission coil 7 of the power feeding device 6. The power receiving coil 5 and the like for receiving electric power are mounted.

The power receiving coil 5 is arranged, for example, in the bottom portion of the vehicle 1. The charging communication ECU 4 transmits/receives information such as frequency, power amount, power feeding start timing, power feeding end timing, power transmission time, power feeding efficiency, and the like regarding power to be wirelessly transmitted to/from the power feeding device 6 by wireless communication. In addition, the charging communication ECU 4 may transmit/receive information for payment of a value for power supply, for example, information on a credit card of a driver of the vehicle 1 to/from the power supply device 6. The charging communication ECU 4 gives the information received from the power supply device 6 to the charging control ECU 3. In addition, the charging communication ECU 4 wirelessly transmits the information for transmission given from the charging control ECU 3 to the power supply device 6. For wireless communication performed between the charging communication ECU 4 and the power supply device 6, for example, a wireless LAN (Local Area Network) standard can be adopted.

The charging control ECU 3 performs a control process necessary for charging the battery 2 using the electric power received by the power receiving coil 5, based on the information obtained from the power feeding device 6 via the charging communication ECU 4. For example, the charging control ECU 3 controls the voltage value and the current value of the electric power supplied to the battery 2 for charging. Further, the charge control ECU 3 calculates the charging rate of the battery 2 and gives a command to stop power transmission to the power supply device 6 when the battery 2 reaches full charge. The wireless power supply between the vehicle 1 and the power supply device 6 is performed in accordance with the ISO15118 standard, for example.

The power supply device 6 is a device that is installed, for example, in a power supply station provided as a commercial facility along a road, or in a home parking lot of a user of the vehicle 1 to perform wireless power supply to the vehicle 1. The power supply device 6 is a device for wirelessly transmitting power to the vehicle 1 by, for example, an electromagnetic induction method or a magnetic resonance method. The power supply device 6 wirelessly transmits electric power from the power transmission coil 7 arranged in a predetermined space such as a road or a parking lot to the power reception coil 5 of the vehicle 1 parked in the predetermined space. At this time, it is preferable that the power transmitting coil 7 and the power receiving coil 5 are close to each other and face each other. When the power feeding device 6 has, for example, a sensor that detects the position of the vehicle 1 or the position of the power receiving coil 5, the power feeding device 6 may transmit information that notifies an appropriate positional relationship to the vehicle 1.

In the present embodiment, power supply device 6 is a device that has both the function of controlling wireless power supply to battery 2 of vehicle 1 and the function of performing wireless communication with charging communication ECU 4 of vehicle 1. However, the power supply device 6 may be a device realized by cooperation of a plurality of devices such as a device having a wireless power supply control function and a device having a wireless communication function. The vehicle 1 can perform wireless power feeding of the battery 2 using a plurality of different power feeding devices 6.

When the battery 2 of the vehicle 1 is supplied with electric power, for example, the user of the vehicle 1 selects any one of a plurality of reachable power supply stations or the like, and drives the vehicle 1 to the selected power supply station or the like. After reaching the power feeding station or the like, the user can park the vehicle 1 in a predetermined place and start wireless power feeding to the vehicle 1 from the power feeding device 6 installed in the power feeding station. At this time, various information exchanges are performed by wireless communication between the power feeding device 6 and the charging communication ECU 4 of the vehicle 1, and after the predetermined procedure processing is completed without any problems, wireless power feeding from the power feeding device 6 to the vehicle 1 is started. It

FIG. 2 is a flowchart for explaining the outline of the procedure of the power feeding process performed by the vehicle power feeding system according to the present embodiment. In the vehicle power feeding system according to the present embodiment, a predetermined procedure process is performed between power feeding device 6 and charging communication ECU 4 of vehicle 1 before starting wireless power feeding from power feeding device 6 to vehicle 1. The charging communication ECU 4 performs a process of scanning (detecting) an AP (access point) of the wireless LAN (step S1). For example, a user who desires wireless power feeding drives the vehicle 1 to visit the power feeding station, parks the vehicle 1 at a predetermined position where the power transmission coil 7 of the power feeding device 6 is arranged, and operates the operation unit provided on the vehicle 1. Operate and give the instruction to start wireless power supply. At this time, among the APs scanned by the charging communication ECU 4, the AP corresponding to the power supply device 6 is selected as the partner of the power supply process.

The charging communication ECU 4 given the start instruction from the user establishes a communication session by a communication protocol such as TCP/TLS (Transmission Control Protocol/Transport Layer Security) in order to enable wireless communication with the power supply device 6. Is performed (step S2). After the communication is established, the charging communication ECU 4 performs a communication setup process for exchanging information such as a session ID in order to perform communication according to the wireless power supply standard (step S3). After that, the charging communication ECU 4 performs a process of confirming a service related to wireless power feeding with the power feeding device 6 (step S4). This is a process of confirming whether the wireless power supply service that the power supply device 6 can provide and the service requested by the vehicle 1 match. The service includes, for example, a wireless power feeding method or a fee payment method.

After the confirmation of the service related to wireless power feeding is completed, the charging communication ECU 4 performs a process of aligning the power receiving coil 5 of the vehicle 1 and the power transmitting coil 7 of the power feeding device 6 (step S5). The alignment process is performed using, for example, a sensor mounted on the vehicle 1 and/or a sensor provided in the vicinity of the location of the power transmission coil 7 of the power feeding device 6. For example, a magnetic sensor or an optical sensor is used as the sensor. The charging communication ECU 4 and the power supply device 6 grasp the positional relationship between the power receiving coil 5 and the power transmitting coil 7 by transmitting and receiving the detection results of these sensors by wireless communication, and guide the vehicle 1 to have an appropriate positional relationship. be able to.

After confirming that the power receiving coil 5 and the power transmitting coil 7 are in the proper positional relationship, the charging communication ECU 4 confirms the parameters relating to the wireless power feeding (step S6). In this step, the charging communication ECU 4 confirms parameters such as the power value and frequency to be transmitted and received, and gives these parameter information to the charging control ECU 3. After that, the charging communication ECU 4 performs wireless power feeding with the power feeding device 6 (step S7). When the battery 2 of the vehicle 1 is fully charged by wireless power feeding, the charging communication ECU 4 ends wireless power feeding (step S8). After that, the charging communication ECU 4 disconnects the wireless communication with the power supply device 6 (step S9), and ends the power supply process.

FIG. 3 is a schematic diagram illustrating a detailed example of the power supply process. The detailed example shown in the figure shows the correspondence between each process of the power supply process shown in the procedure of FIG. 2 and the process defined by ISO15118-2 which is the standard of the wireless power supply. Further, in each processing of ISO15118-2 shown in the figure, the names of the messages transmitted and received between the charging communication ECU 4 and the power supply device 6 in this processing are described. However, the AP scan in step S1, the part of communication establishment in step S2, and the communication disconnection process in step S9 are combined with the process defined by the communication standard of the wireless LAN.

In the AP scan process, the charging communication ECU 4 receives a beacon (Beacon) transmitted from the power supply device 6 to perform the process. In the process of establishing communication, messages such as “IP address assignment”, “SECC Discovery”, and “TCP/TLS connection establishment” are transmitted and received. The “IP address assignment” is a message that specifies the method of acquiring an IP address. “SECC Discovery” is a message for acquiring the IP address and port number. The “TCP/TLS connection establishment” is a message for performing authentication processing for establishing TCP/TLS communication.

In the communication setup process, messages such as “supported App Protocol” and “Session Setup” are transmitted and received. The “supported App Protocol” is a message for transmitting and receiving information regarding the charging protocol supported by the charging communication ECU 4. "Session Setup" is a message for transmitting and receiving information such as a session ID for performing communication at the application level. In the service confirmation processing, messages such as “Service Discovery”, “Service Detail”, and “Service Selection” are transmitted and received. “Service Discovery” is a message for transmitting and receiving information related to the wireless power supply service provided by the power supply device 6. “Service Detail” is a message for the charging communication ECU 4 to acquire additional information about the service provided by the power supply device 6. “Service Selection” is a message for the charging communication ECU 4 to select any of the services provided by the power supply device 6.

In the alignment processing, messages such as "Fine Positioning Setup", "Fine Positioning", "Authorization", "Paring" are transmitted and received. “Fine Positioning Setup” is a message for notifying the start of the positioning process. “Fine Positioning” is a message for transmitting and receiving information indicating the positions of the power receiving coil 5 of the vehicle 1 and the power transmitting coil 7 of the power feeding device 6, and is repeatedly transmitted and received between the vehicle 1 and the power feeding device 6. The "Authorization" is a message for transmitting and receiving information such as a payment method for the power supply. “Paring” is a message for confirming the correspondence between the power transmission coil 7 of the power supply device 6 and the vehicle 1.

In the parameter confirmation processing, messages such as “Charge Parameter Discovery”, “Alignment Check”, and “Power Delivery” are transmitted and received. “Charge Parameter Discovery” is a message for exchanging information regarding parameters such as power value and frequency of power transmitted and received by wireless power feeding. “Alignment Check” is a message that is transmitted and received when actually transmitting and receiving electric power and performing processing to confirm whether electric power is being transmitted and received or the positions of the power receiving coil 5 and the power transmitting coil 7 are correctly aligned. .. “Power Delivery” is a message for notifying the timing of starting wireless power supply.

In the power supply process, messages such as "Power Demand" are transmitted and received. “Power Demand” is a message for transmitting and receiving information related to the status of wireless power supply, and is periodically transmitted and received between the power supply device 6 and the charging communication ECU 4. In the process of ending the power supply, a message such as “Session Stop” is transmitted and received. "Session Stop" message stops application level communication. In the process of disconnecting communication, a message such as "TCP/TLS connection termination" is transmitted and received. The message of "TCP/TLS connection termination" disconnects the wireless communication connection between the power supply device 6 and the charging communication ECU 4.

<Device configuration>
FIG. 4 is a block diagram showing the configuration of charging communication ECU 4 according to the present embodiment. The charging communication ECU 4 according to the present embodiment is configured to include a processing unit (processor) 41, a storage unit (storage) 42, a wireless communication unit (transceiver) 43, an in-vehicle communication unit (transceiver) 44, and the like. The processing unit 41 is configured using an arithmetic processing device such as a CPU (Central Processing Unit) or an MPU (Micro-Processing Unit). The processing unit 41 reads out and executes the program 42a stored in the storage unit 42 to restart the process of performing wireless communication for exchanging information regarding wireless power supply with the power supply device 6 and the interrupted process. Processing is performed.

The storage unit 42 is configured by using a nonvolatile memory element such as a flash memory or an EEPROM (Electrically Erasable Programmable Read Only Memory). The storage unit 42 stores various programs executed by the processing unit 41 and various data necessary for the processing of the processing unit 41. In the present embodiment, the storage unit 42 stores a program 42a executed by the processing unit 41, and an interruption point storage unit 42b that stores an interruption point when the process related to wireless power feeding is interrupted. ..

The program 42a may be written in the storage unit 42, for example, at a manufacturing stage of the charging communication ECU 4, or the charging communication ECU 4 may obtain a program distributed by a remote server device or the like by communication, or a memory, for example. The charging communication ECU 4 may read the program 42a recorded on the recording medium 99 such as a card or an optical disc and store it in the storage unit 42. For example, the program 42a recorded on the recording medium 99 may be read by the writing device and charging communication may be performed. It may be written in the storage unit 42 of the ECU 4. The program 42a may be provided in the form of distribution via a network, or may be provided in the form recorded on the recording medium 99.

The interruption point storage unit 42b is provided by using an area of the storage unit 42. The interruption point storage unit 42b stores which of a plurality of processes included in the power supply process performed with the power supply device 6 causes the interruption. The interruption point storage unit 42b stores, for example, a process number or a sequence number set for the interrupted process as the interruption point of the power feeding process.

The wireless communication unit 43 performs wireless communication with the power supply device 6 in accordance with a wireless LAN communication protocol, for example. The wireless communication unit 43 can be configured using an IC (Integrated Circuit) of a wireless transceiver. The wireless communication unit 43 performs wireless transmission to the power supply device 6 by outputting a signal obtained by modulating the transmission data provided from the processing unit 41 to the antenna. Further, the wireless communication unit 43 provides the processing unit 41 with the data obtained by demodulating the signal received by the antenna.

The in-vehicle communication unit 44 performs wired communication according to the CAN communication protocol, for example. The in-vehicle communication unit 44 can be configured using an IC of a so-called CAN transceiver. The in-vehicle communication unit 44 is connected to other vehicle-mounted devices such as the charging control ECU 3 via a communication line such as a CAN bus arranged in the vehicle 1, and communicates with these other vehicle-mounted devices according to the CAN communication protocol. I do. The in-vehicle communication unit 44 converts the data for transmission given from the processing unit 41 into an electric signal according to the CAN communication protocol and outputs the electric signal to the communication line, thereby transmitting the data to another vehicle-mounted device. Further, the in-vehicle communication unit 44 receives data from another in-vehicle device by sampling and acquiring the potential of the communication line, and gives the received data to the processing unit 41.

Further, in the charging communication ECU 4 according to the present embodiment, the processing unit 41 reads and executes the program 42a stored in the storage unit 42, so that the power feeding communication processing unit 41a, the restart processing unit 41b, the movement detection unit 41c, and the matching unit 41c. The processing unit 41d and the like are implemented by the processing unit 41 as software-like functional blocks. The power feeding communication processing unit 41a performs a process of transmitting and receiving various information necessary for power feeding of the battery 2 of the vehicle 1 to and from the power feeding device 6, and relays communication between the power feeding device 6 and the charging control ECU 3. In addition, the power feeding communication processing unit 41a performs the power feeding processing illustrated in FIG. 2 by exchanging information with the power feeding device 6 by wireless communication.

The restart processing unit 41b performs processing for causing the power supply communication processing unit 41a to restart the interrupted power supply processing when the power supply processing illustrated in FIG. 2 performed by the power supply communication processing unit 41a is interrupted for some reason. The resumption processing unit 41b determines the resumption place of the power feeding process based on the interruption place stored in the interruption place storage unit 42b of the storage unit 42 and the presence or absence of the movement of the vehicle 1 detected by the movement detection unit 41c described later. To do. Note that interruption of the power supply process includes stop of the process, abnormal termination, forced termination, or a state in which the same process is repeated over a predetermined period that is set in advance.

The movement detector 41c performs a process of detecting whether or not the vehicle 1 has moved. The movement detection unit 41c uses the in-vehicle communication of the in-vehicle communication unit 44 to inform the vehicle 1 of information such as the vehicle speed of the vehicle 1, the state of the transmission, the state of the steering, the state of the parking brake, and/or the state of the foot brake. Obtained from other mounted in-vehicle devices. The movement detection unit 41c detects whether or not the vehicle 1 has moved based on the acquired one or more pieces of information. In the present embodiment, movement detection unit 41c acquires information on the vehicle speed of vehicle 1 from a vehicle speed sensor or the like by in-vehicle communication, and detects whether or not vehicle 1 has moved according to the vehicle speed. The movement detection unit 41c determines that the vehicle 1 is not moving, for example, when the vehicle speed of the vehicle 1 is 0 km/h, and determines that the vehicle 1 is moving when the vehicle speed is greater than 0 km/h. You can

When the restart processing unit 41b restarts the power feeding process, the matching processing unit 41d performs a process of matching with the power feeding device 6 at the restarted portion. When restarting the interrupted power supply process, it is necessary to share information regarding which process is restarted between the charging communication ECU 4 and the power supply device 6. In the present embodiment, the matching processing unit 41d matches the restart location by notifying the power supply device 6 of the restart location determined by the restart processing unit 41b. The power supply device 6 that has received the notification of the restart location from the charging communication ECU 4 restarts the power supply processing from the notified location.

FIG. 5 is a block diagram showing the configuration of power supply device 6 according to the present embodiment. The power supply device 6 according to the present embodiment includes a processing unit (processor) 61, a storage unit (storage) 62, a wireless communication unit (transceiver) 63, a power supply control unit 64, and the like. The processing unit 61 is configured by using an arithmetic processing device such as a CPU or MPU. The processing unit 61 reads and executes the program 62a stored in the storage unit 62, thereby performing a process of performing wireless communication for exchanging information regarding wireless power supply with the charging communication ECU 4 of the vehicle 1 and the interruption. A process for restarting the process is performed.

The storage unit 62 is configured by using a nonvolatile memory element such as a flash memory or an EEPROM. The storage unit 62 stores various programs executed by the processing unit 61 and various data necessary for the processing of the processing unit 61. In the present embodiment, the storage unit 62 stores a program 62a executed by the processing unit 61. The program 62a may be written in the storage unit 62, for example, at the manufacturing stage of the power feeding device 6, or the power feeding device 6 may obtain a program distributed by a remote server device or the like through communication, or a memory, for example. The power supply device 6 may read the program 62a recorded in the recording medium 98 such as a card or an optical disk and store it in the storage unit 62. Alternatively, for example, the writing device may read the program 62a recorded in the recording medium 98 and the power supply device. 6 may be written in the storage unit 62. The program 62a may be provided in the form of distribution via a network, or may be provided in the form recorded on the recording medium 98.

The wireless communication unit 63 performs wireless communication with the charging communication ECU 4 in accordance with a wireless LAN communication protocol, for example. The wireless communication unit 63 can be configured using an IC of a wireless transceiver. The wireless communication unit 63 performs wireless transmission to the charging communication ECU 4 by outputting a signal obtained by modulating the data for transmission given from the processing unit 61 to the antenna. Further, the wireless communication unit 63 gives the data obtained by demodulating the signal received by the antenna to the processing unit 61.

The power feeding control unit 64 controls power transmission to the vehicle 1 by the power transmission coil 7 according to a command or the like given from the processing unit 61. The processing unit 61 determines, for example, the amount of power and the frequency of the power to be transmitted based on the information transmitted and received by wireless communication with the charging communication ECU 4, and notifies the power supply control unit 64 of these values. The power feeding control unit 64 controls the amount and frequency of the power transmitted from the power transmission coil 7 based on the value notified from the processing unit 61.

Further, in the power supply device 6 according to the present embodiment, the processing unit 61 reads and executes the program 62a stored in the storage unit 62, so that the power supply processing unit 61a, the matching processing unit 61b, the restart processing unit 61c, and the like perform processing. It is realized as a software-like functional block in the unit 61. The power feeding processing unit 61 a performs a process of transmitting and receiving various information necessary for wireless power feeding to the vehicle 1 to and from the charging communication ECU 4, and also gives a command to the power feeding control unit 64 to send power from the power transmission coil 7 to the vehicle 1. The process of controlling the wireless power supply of is performed. In addition, the power supply processing unit 61a performs the power supply processing illustrated in FIG. 2 by exchanging information with the charging communication ECU 4 by wireless communication.

When the power supply process performed with the vehicle 1 is interrupted and the interrupted power supply process is restarted, the matching processing unit 61b performs a process of matching the restarted position with the vehicle 1. In the present embodiment, the matching processing unit 61b receives the notification of the restart position transmitted from the charging communication ECU 4 of the vehicle 1 to match the restart position with the vehicle 1. The matching processing unit 61b provides the restart processing unit 61c with the information regarding the restart location received from the vehicle 1.

The restart processing unit 61c performs a process of restarting the interrupted power supply process based on the information about the restarted location provided from the matching processing unit 61b.

<Resumption of power supply processing>
In the vehicle power feeding system according to the present embodiment, when the power feeding process performed between the vehicle 1 and the power feeding device 6 is interrupted, the process of restarting the power feeding process from an appropriate place is performed. FIG. 6 is a schematic diagram for explaining the correspondence between the interrupted portion and the restarted portion of the power feeding process. In the illustrated example, the interruption point and the restart point are set in association with each process included in the power feeding process shown in FIG. Further, in the vehicle power feeding system according to the present embodiment, the restart location of the power feeding process changes depending on whether or not the vehicle 1 is moving when the power feeding process is interrupted.

If the interruption occurs between the start of the AP scan processing of the power feeding processing and the end of the communication establishment processing, and if the vehicle 1 is not moving when the power feeding processing is interrupted, the charging communication ECU 4 The process is restarted from the AP scan. If an interruption occurs after the communication setup processing of the power supply processing and the vehicle 1 is not moving when the power supply processing is interrupted, the charging communication ECU 4 first performs processing from AP scanning to communication establishment. After the communication with the power supply device 6 is established, the power supply process is restarted from the position where the interruption occurs.

When the interruption occurs between the start of the AP scan processing of the power feeding processing and the end of the communication establishing processing, and when the vehicle 1 is moving when the power feeding processing is interrupted, the charging communication ECU 4 The process is restarted from the AP scan. If an interruption occurs between the start of the communication setup process of the power supply process and the end of the service confirmation process, and if the vehicle 1 is moving when the power supply process is interrupted, the charging communication ECU 4 first determines the AP. After the process from the scan to the establishment of communication is performed to establish communication with the power supply device 6, the power supply process is restarted from the position where the interruption occurs. When the interruption occurs after the position adjustment processing of the power feeding processing and the vehicle 1 is moving when the power feeding processing is interrupted, the charging communication ECU 4 first performs processing from AP scanning to communication establishment. After establishing communication with the power feeding device 6, the process is restarted from the alignment of the power feeding process.

FIG. 7 is a flowchart showing the procedure of the restart process performed by charging communication ECU 4 according to the present embodiment. The restart processing unit 41b of the processing unit 41 of the charging communication ECU 4 according to the present embodiment determines whether or not the wireless communication with the power supply device 6 is disconnected (step S21). When the wireless communication is not disconnected (S21: NO), the restart processing unit 41b waits until the wireless communication is disconnected. When the wireless communication is disconnected (S21: YES), the restart processing unit 41b determines whether the disconnection factor of the wireless communication is related to communication such as timeout (step S22). When the disconnection factor is not a timeout or the like (S22: NO), the restart processing unit 41b ends the process without restarting the power feeding process. When the disconnection factor is time-out or the like (S22: YES), the restart processing unit 41b stores the interruption point of the power feeding process in the interruption point storage unit 42b (step S23).

Next, the restart processing unit 41b performs an AP scan process for detecting the wireless LAN access point (power supply device 6) (step S24). Note that this process is the same as the process performed in step S1 of the power supply process shown in FIG. The restart processing unit 41b determines whether the access point detected by the AP scan is the same access point that was communicating before the interruption (step S25). If they are not the same access point (S25: NO), the restart processing unit 41b determines whether or not the access point is detected by the AP scan (step S31). When no access point is detected (S31: NO), the restart processing unit 41b returns the process to step S24 and repeats the AP scan. When the access point is detected (S31: YES), the restart processing unit 41b discards the information about the interruption point stored in the interruption point storage unit 42b (step S32), and newly supplies power to the new access point. The process is started (step S33), and the process is returned to step S21. That is, when the wireless communication with the power supply apparatus 6 in which the processing is interrupted cannot be restarted and another power supply apparatus 6 is detected, the restart processing unit 41b performs the power supply processing with the new power supply apparatus 6. Try.

When the access point detected by the AP scan is the same access point that was communicating before the interruption (S25: YES), the restart processing unit 41b performs a process of establishing communication with this access point. Is performed (step S26). Note that this process is the same as the process performed in step S2 of the power supply process shown in FIG. After that, the restart processing unit 41b reads out the interruption point stored in the interruption point storage unit 42b (step S27). The restart processing unit 41b performs restart location determination processing that determines the restart location of the power supply processing based on the read interrupt location (step S28). After the completion of the restart location determination process, the matching processing unit 41d of the processing unit 41 notifies the power supply apparatus 6 of the determined restart location (step S29), and matches the restart location with the power supply apparatus 6. The restart processing unit 41b restarts the power supply process from the determined restart location (step S30), and returns the process to step S21.

FIG. 8 is a flowchart showing the procedure of the restart location determination process performed by charging communication ECU 4 according to the present embodiment. The illustrated resumption point determination process is the process performed in step S28 of the flowchart shown in FIG. The movement detection unit 41c of the processing unit 41 of the charging communication ECU 4 according to the present embodiment communicates the vehicle speed information of the vehicle 1 by communicating with other in-vehicle devices mounted on the vehicle 1 at the in-vehicle communication unit 44. It is acquired (step S41). The movement detection unit 41c determines whether or not the vehicle 1 has moved based on the acquired vehicle speed information (step S42). When the vehicle 1 is not moving (S42: NO), the restart processing unit 41b determines to restart the process from the interrupted point stored in the interrupted point storage unit 42b (step S45), and ends the restarted point determination process. ..

When the vehicle 1 is moving (S42: YES), the restart processing unit 41b determines whether or not the interruption point stored in the interruption point storage unit 42b is after the alignment process (step S43). When the interrupted position is after the position adjustment (S43: YES), the restart processing unit 41b determines to restart the process from the position adjustment (step S44), and ends the restart position determination process. When the interrupted point is before the alignment (S43: NO), the restart processing unit 41b determines to restart the process from the interrupted point stored in the interrupted point storage unit 42b (step S45), and executes the restarted point determination process. finish.

If the interrupted part is the process of AP scanning or communication establishment, the process has already been restarted at the time when the restarted part determination process of this figure is performed. Therefore, when the interrupted portion is the AP scan or the communication establishment processing, the restart processing unit 41b may set the communication setup processing as the restarted portion in step S45.

Further, when the power supply device 6 according to the present embodiment receives the notification of the restarted portion from the charging communication ECU 4 after the communication with the charging communication ECU 4 of the vehicle 1 is established, the power feeding device 6 starts from the position designated by the notification. When the power feeding process is performed and the notification is not received, the power feeding process may be performed in a normal order.

<Summary>
In the vehicle power feeding system according to the present embodiment having the above-described configuration, the power feeding device 6 that feeds power to the vehicle 1 and the charging communication ECU 4 mounted on the vehicle 1 wirelessly communicate with each other to transmit and receive data, thereby feeding power. A plurality of processes related to is executed in a predetermined order. When an interruption occurs in these processes, the charging communication ECU 4 stores the interruption point in the interruption point storage unit 42b, and attempts to restart the process based on the stored interruption point. At this time, the charging communication ECU 4 restarts the plurality of processes from the beginning when the interruption occurs before the completion of the communication establishing process included in the plurality of processes executed in the predetermined order. Further, when the interruption occurs after the completion of the communication establishment processing, the charging communication ECU 4 restarts the processing from the interruption location stored in the interruption location storage unit 42b after executing a plurality of processings from the beginning to the communication establishment processing. As a result, the charging communication ECU 4 can surely execute the process of establishing the minimum necessary communication, omit the process that is not always necessary, and restart the interrupted process, thereby reducing the processing time due to the interruption of the process. The increase can be suppressed.

Further, charging communication ECU 4 according to the present embodiment detects whether or not vehicle 1 is moving during processing. If the interruption occurs after the start of the alignment that is performed after the process of establishing communication and the vehicle 1 is not moving, the charging communication ECU 4 performs a plurality of processes from the beginning until the communication is established. The processing is restarted from the interruption point stored in the interruption point storage unit 42b. Further, when the interruption occurs after the start of the alignment and the vehicle 1 moves, the charging communication ECU 4 executes a plurality of processes from the beginning until the communication is established, and then restarts the process from the alignment. As a result, the charging communication ECU 4 can appropriately execute the alignment process affected by the presence or absence of movement of the vehicle 1.

Further, in the vehicle power feeding system according to the present embodiment, when restarting the process interrupted between charging communication ECU 4 and power feeding device 6, charging communication ECU 4 and power feeding device 6 perform the process of matching the restarted points. As a result, the charging communication ECU 4 and the power supply device 6 can reliably restart the interrupted process.

Note that, in the present embodiment, a plurality of processes included in the power supply process performed between the charging communication ECU 4 and the power supply device 6 are shown in FIGS. 2 and 3, but these processes are examples, and the power supply process The processing included in is not limited to these. The plurality of processes performed between the charging communication ECU 4 and the power supply device 6 may include processes other than the processes shown in FIGS. 2 and 3, and any one of the processes shown in FIGS. 2 and 3. Need not be included. Further, the correspondence between the interrupted point and the restarted point shown in FIG. 4 is also an example, and the correspondence between the interrupted point and the restarted point is not limited to this, and a plurality of types of processing performed between the charging communication ECU 4 and the power supply device 6 It may be appropriately determined according to the order and the order.

Further, the charging communication ECU 4 according to the present embodiment determines the restart location depending on the presence/absence of movement of the vehicle 1, but the timing of detecting the presence/absence of movement of the vehicle 1 may be any time. For example, the charging communication ECU 4 periodically acquires and accumulates information regarding the presence/absence of movement of the vehicle 1, and determines the restart location depending on the presence/absence of movement of the vehicle 1 at the timing before the interruption occurs. Good. Further, for example, the charging communication ECU 4 may determine whether or not the vehicle 1 has moved immediately after the interruption of the process.

In addition, in the vehicle power feeding system according to the present embodiment, the charging communication ECU 4 notifies the power feeding device 6 of the restarted portion so that the restarted portion of the process is aligned, but the present invention is not limited to this. For example, the power supply device 6 may store the interruption point of the process and determine the restart point like the charging communication ECU 4. When both the charging communication ECU 4 and the power supply device 6 determine the restart location, the restart location may not be notified, and the restart location may be notified to each other. Further, when both the charging communication ECU 4 and the power feeding device 6 restart the process at their own judgment without notifying the restarted part, the restarted part determination process performed by both devices is regarded as a process for matching the restarted part between the devices. be able to.

The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above meaning but by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

1 vehicle 2 battery 3 charge control ECU
4 Charge communication ECU (in-vehicle communication device)
5 power receiving coil 6 power feeding device 7 power transmitting coil 41 processing unit 41a power feeding communication processing unit 41b restart processing unit 41c movement detection unit 41d matching processing unit 42 storage unit 42a program 42b interruption point storage unit 43 wireless communication unit 44 in-vehicle communication unit 61 processing unit 61a Power feeding processing unit 61b Matching processing unit 61c Restart processing unit 62 Storage unit 62a Program 63 Wireless communication unit 64 Power feeding control unit 98,99 Recording medium

Claims (8)

An in-vehicle communication device that performs wireless communication with a power supply device that supplies power to a vehicle,
By transmitting and receiving data to and from the power supply device, a power supply communication processing unit that executes a plurality of processes related to power supply in a predetermined order,
A storage unit that stores the interruption point when the interruption of the process by the power supply communication processing unit occurs,
A restart processing unit that restarts the processing of the power feeding communication processing unit based on the interruption point stored in the storage unit,
The restart processing unit,
When an interruption occurs before the completion of the first predetermined process included in the plurality of processes executed in a predetermined order, the plurality of processes are restarted from the beginning,
If an interruption occurs after the completion of the first predetermined processing, the plurality of processings are executed from the beginning to the first predetermined processing, and then the processings are restarted from the interruption points stored in the storage unit.
In-vehicle communication device. The in-vehicle communication device according to claim 1, wherein the first predetermined process is a process of establishing wireless communication with a predetermined communication protocol between the power supply device and the in-vehicle communication device. A movement detection unit that detects movement of the vehicle during processing of the power supply communication processing unit;
The restart processing unit,
When an interruption occurs after the start of the second predetermined process performed after the first predetermined process and the movement of the vehicle is not detected by the movement detection unit, the plurality of processes are performed from the beginning. After executing up to the first predetermined process, the process is restarted from the interruption point stored in the storage unit,
When an interruption occurs after the second predetermined process is started and the movement of the vehicle is detected by the movement detection unit, the plurality of processes are executed from the beginning to the first predetermined process, and then the first predetermined process is performed. 2. The in-vehicle communication device according to claim 1 or 2, which is restarted from a predetermined process. The in-vehicle communication device according to claim 3, wherein the second predetermined process is a process of aligning the vehicle with the power supply device. A vehicle power feeding system including a power feeding device that feeds power to a vehicle, and an in-vehicle communication device that performs wireless communication with the power feeding device,
The in-vehicle communication device,
By transmitting and receiving data to and from the power supply device, a power supply communication processing unit that executes a plurality of processes related to power supply in a predetermined order,
A storage unit that stores the interruption point when the interruption of the process by the power supply communication processing unit occurs,
A restart processing unit that restarts the processing of the power feeding communication processing unit based on the interrupted location stored in the storage unit,
The restart processing unit,
When an interruption occurs before the completion of the first predetermined process included in the plurality of processes executed in a predetermined order, the plurality of processes are restarted from the beginning,
When an interruption occurs after the completion of the first predetermined processing, after executing the plurality of processing from the beginning to the first predetermined processing, the processing is restarted from the interruption point stored in the storage unit,
The power supply device restarts processing from processing corresponding to the processing restarted by the restart processing unit,
Vehicle power supply system. The vehicle power feeding system according to claim 5, wherein the power feeding device or the in-vehicle communication device includes a matching processing unit that performs a process of matching a process restart point. An in-vehicle communication device that performs wireless communication with a power supply device that supplies power to a vehicle,
By transmitting and receiving data to and from the power supply device, a plurality of processes related to power supply are executed in a predetermined order,
When an interruption occurs in the plurality of processes, the interruption point is stored in the storage unit,
If an interruption occurs before completion of the first predetermined process included in the plurality of processes executed in a predetermined order, the plurality of processes are restarted from the beginning,
When an interruption occurs after the completion of the first predetermined processing, the plurality of processings are executed from the beginning to the first predetermined processing, and then the processing is restarted from the interruption point stored in the storage unit. Computer program. Using an in-vehicle communication device that performs wireless communication with a power supply device that supplies power to the vehicle,
By transmitting and receiving data to and from the power supply device, a plurality of processes related to power supply are executed in a predetermined order,
When an interruption occurs in the plurality of processes, the interruption point is stored in the storage unit,
If an interruption occurs before completion of the first predetermined process included in the plurality of processes executed in a predetermined order, the plurality of processes are restarted from the beginning,
When an interruption occurs after the completion of the first predetermined processing, the plurality of processings are executed from the beginning to the first predetermined processing, and then the processing is restarted from the interruption point stored in the storage unit.
How to resume processing.

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